Effect of birth order on neonatal morbidity and mortality among very low birthweight twins: a population based study.
D001722:Birth Order; D002585:Cesarean Section; D016208:Databases, Factual; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D019102:Infant, Very Low Birth Weight; D007557:Israel / Q000453:epidemiology; D009017:Morbidity; D013223:Statistics as Topic; D014427:Twins